EP 3605237 B1 20230920 - CARRIER CORE MATERIAL, AND ELECTROPHOTOGRAPHIC CARRIER AND ELECTROPHOTOGRAPHIC DEVELOPER THAT USE CARRIER CORE MATERIAL
Title (en)
CARRIER CORE MATERIAL, AND ELECTROPHOTOGRAPHIC CARRIER AND ELECTROPHOTOGRAPHIC DEVELOPER THAT USE CARRIER CORE MATERIAL
Title (de)
TRÄGERKERNMATERIAL UND ELEKTROPHOTOGRAPHISCHER TRÄGER UND ELEKTROPHOTOGRAPHISCHER ENTWICKLER, DIE TRÄGERKERNMATERIAL VERWENDEN
Title (fr)
MATÉRIAU DE NOYAU DE SUPPORT, ET SUPPORT ÉLECTROPHOTOGRAPHIQUE ET RÉVÉLATEUR ÉLECTROPHOTOGRAPHIQUE QUI UTILISENT UN MATÉRIAU DE NOYAU DE SUPPORT
Publication
Application
Priority
- JP 2017069667 A 20170331
- JP 2018010215 W 20180315
Abstract (en)
[origin: US2019391506A1] A carrier core material is represented by a composition formula MXFe3-XO4 (where M is at least one type of metal element selected from Mg, Mn, Ca, Ti, Cu, Zn and Ni, 0<X<1), in which part of M and/or Fe is substituted with Sr and formed of ferrite particles, and in the carrier core material, a Sr content is equal to or more than 2500 ppm but equal to or less than 12000 ppm, the amount of Sr eluted with pure water at a temperature of 25° C. is equal to or less than 50 ppm, an apparent density is equal to or more than 1.85 g/cm3 but equal to or less than 2.25 g/cm3 and magnetization σ1k when a magnetic field of 79.58×103 A/m (1000 oersteds) is applied is equal to or more than 63 Am2/kg but equal to or less than 75 Am2/kg.
IPC 8 full level
G03G 9/113 (2006.01); C01G 49/00 (2006.01); G03G 9/107 (2006.01)
CPC (source: EP US)
C01G 49/0036 (2013.01 - EP US); C01G 49/0072 (2013.01 - EP); G03G 9/1075 (2013.01 - US); G03G 9/108 (2020.08 - EP); G03G 9/1085 (2020.08 - EP US); G03G 9/1087 (2020.08 - EP); G03G 9/1132 (2013.01 - EP); C01P 2002/54 (2013.01 - EP); C01P 2004/61 (2013.01 - EP); C01P 2006/10 (2013.01 - EP US); C01P 2006/22 (2013.01 - EP); C01P 2006/42 (2013.01 - EP US); G03G 9/1075 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 10915034 B2 20210209; US 2019391506 A1 20191226; CN 110494809 A 20191122; CN 110494809 B 20230811; EP 3605237 A1 20200205; EP 3605237 A4 20201223; EP 3605237 B1 20230920; JP 2018173445 A 20181108; JP 6757284 B2 20200916; WO 2018180543 A1 20181004
DOCDB simple family (application)
US 201816491365 A 20180315; CN 201880020990 A 20180315; EP 18778113 A 20180315; JP 2017069667 A 20170331; JP 2018010215 W 20180315